package cn.uncode.springcloud.utils.barcode.qrcode.components;

import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.OutputStream;
import java.io.IOException;
import java.awt.image.BufferedImage;
public final class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private MatrixToImageWriter() {}
 
public static BufferedImage toBufferedImage(BitMatrix matrix) {
	int width = matrix.getWidth();
	int height = matrix.getHeight();
	BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	for (int x = 0; x < width; x++) {
		for (int y = 0; y < height; y++) {
			image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
		}
	}
	return image;
}
 
public static void writeToFile(BitMatrix matrix, String format, File file)
	throws IOException {
	BufferedImage image = toBufferedImage(matrix);
	if (!ImageIO.write(image, format, file)) {
		throw new IOException("Could not write an image of format " + format + " to " + file);
	}
}
public static OutputStream writeToStream(BitMatrix matrix, String format, OutputStream stream)
	throws IOException {
	BufferedImage image = toBufferedImage(matrix);
	if (!ImageIO.write(image, format, stream)) {
		throw new IOException("Could not write an image of format " + format);
	}
	return stream;
	}
}